Evenkite

Evenkite is a rare hydrocarbon mineral with formula (CH₃)₂(CH₂)₂₂ or C₂₄H₅₀. Chemically it is n-tetracosane.

It was first described in 1953 for the occurrence in the Khavokiperskiye deposit, Lower Tunguska River, Evenkiysky District, Siberia, Russia, where it occurs in vugs within a quartz vein in welded tuff. Associated minerals include quartz, chalcedony, pyrite, pyrrhotite, sphalerite, galena, chalcopyrite and calcite. It was named for the Evenkia district. It has also been reported from the Hautes-Alpes region of France and the Slanské and Vihorlat mountains of Slovakia.